Fan



Dec. 29, 1925.

H. R. STUART FAN Filed June 26I 1924 2 Sheets-Sheet 1 z w n c. 1 ad fm,

De.=29,1925. f 1,567,401

H. R. STUART FAN Filed June 26, 1924 2 Sheets-Sheet 2 @namur PatentedDec, 29, 1.925. p

UNITED STATES y 1,567,4oi PATENT OFFICE.

HARVE R. STUART, OF SPRINGFIELD. OHIO, ASSIGNOR TO THE ROBBINS & MYERSCOMPANY, F SPRINGFIELD, OHIO, A CORPORATION OF OHIO.

FAN.

Application filed June 26, 1924. Serial No. 722,450.

Y 10 all whom t may concern Be it known that I, HAI-wn R. STUART, acitizen of the United States, residing at Springfield, in the county ofClark and State of Ohio, have invented certain new and uscfulImprovements in Fans, of which the following is a specification.

This invention relates to improvements in fans, it relating moreparticularly to means for adjusting the angle of the blades of the fanto direct the air currents in one direction or the other; the inventionbeing more especially intended for fans of the type which are suspendedfrom a ceiling for ventilation purposes.

In fans of the character referred to, it is desirable and usual toprovide means for changing the angle of the fan blades so as to directthe air currents either upwardly or downwardly without the necessity ofreversing the motor.

The object of my invention is to devise an arrangement whereby theblades mayI be quickly adjusted in a simple, accurate and uniformmanner.

Referring to the drawings:

Fig. l is a vertical section of the rotor of an electric motor to whichthe fan blades are attached, the section being on the line 3 1-1 of Fig.2.

Fig. 2 is a top plan view of the same.

Fig. 3 is a bottom plan view of the same showing a portion of two fanblades and their shanks connected in position.

Fig. it is an end view of the shank of one of the fan blades and itsblade showing 'rn section the rot-or ring to which the shanks of theblades are attached.

Fig. 5 is an elevation of one of the blade shanks.

Referring to the drawings, l represents the hub of the rotor of anelectric motor which is in the present case the armature. This hub isrotatably mounted upon a suitable support (not shown) and has radiatingtherefrom a series of downwardly and outwa-rdly curved arms 2 to form aspider-like structure. Integrally formed with four of these arms 2 areoutwardly extending radial extensions 3, the outer ends of which areformed with integral heads 4 to which are attached the laminatedstructure 5 forming the coils of the armature.

Supported by the arms 2 is a blade carrying ring 6, this ring beingpreferably cast integrally with the outer ends of these arms;

and lying in concentric relation with the axis of the rotor. The lowerside of this ring is formed with two sets of inclined faces 'i' and 8,the faces of one set heilig uniformly inclined at an acute angle in onedirection to the plane of rotation of the ring and the faces of theother set being uniformly in clined at an acute angle in anotherdirection to the plane of rotation of said ring, the angles ofinclination, however, of both sets being of the same dimensions. Thefaces of one set alternate with the faces of the other set. In thestructure shown in the draw ings eight of these inclined faces are employed, the faces 7 being preferably marked Up and the faces 8 Down Eachin clined face is provided with a pair of openings 9 to receive bolts orother suitable fastening devices for the purpose of securing the bladesin position. A portion l0 of two of the blades is shown in Fig. 3, eachblade being connected with a curved shank 1l, the outer end of eachshank being formed in the nature of a fiat plate 12 which is secured tothe inner end of the fan blade and the inner end of the shank formedwith a plate 153 provided with a pair of perforations 14 to receivescrew-bolts l5 or other suitable fastening devices to secure it to oneof the inclined faces.

If it is desired to direct the air currents downwardly the plates 13 ofthe blade Shanks are attached to the faces S. In the event it is desiredto adjust the blades to direct the air currents upwardly the plates 'i3are attached to the inclined surfaces 7. This furnishes a very simplemeans for quickly and accurately adjusting and changing the fan bladesso as to directthe air currents either upwardly or downwardly.

Having thus described my invention, I claim:

1. In a. structure of the character described, a rotor, a series ofspider-like arms projecting from said rotor, a ring supported by saidarms in concentric relation with the axis of said rotor, the outer faceof said ring being formed with a set of faces inclined in one directionwith respect to the plane of rotation of said ring and with an other setof faces in alternating relation with the faces of said first set andinclined in another direction with respect to the axis of rotation, anda series of fan blades adapted to be detachably connected With eitherset of faces. n

2. In a structure of the character described, a rotor consisting` of a.hub, a series of spider like arms projecting from said hub, a ringsupported by said arms in concentric relation with the axis of said hub,the outer face of said ring being formed;

With a set of faces inclined in one direction with respect to theplaneof rotation of said ring and With another set of faces inalterhating relation with the faces of said first set and inclined inanotherdirection"With respect to the axis of said hub, a series'of fanblades adapted to be detachably connected With either set of faces, aseries of radial supports projecting lbeyond, said ring, and armaturecoils carried by said supports.

"In testimony whereof, I have hereunto set my hand this 20th day of June1924.

HARVE R. STUART,

